Lux to exalux converter
Convert lux (lx) to exalux (Elx). Calculate any value, follow the unit-factor steps and check a conversion table.
Updated · How we checkUse a decimal point, such as 2.5. Enter a value in lx; the result is in Elx.
Formula
Worked example
Convert 1 lx to Elx:
1 lx ≈ 1e-18 Elx
Multiply your lx value by the factor above. The calculator uses the full conversion factor before rounding the displayed answer.
Lux to exalux table
Reference values rounded to 10 significant digits. Use the converter above for other amounts.
| Lux (lx) | Exalux (Elx) |
|---|---|
| 0.1 | ≈ 1e-19 |
| 0.5 | ≈ 5e-19 |
| 1 | ≈ 1e-18 |
| 2 | ≈ 2e-18 |
| 5 | ≈ 5e-18 |
| 10 | ≈ 1e-17 |
| 25 | ≈ 2.5e-17 |
| 50 | ≈ 5e-17 |
| 100 | ≈ 1e-16 |
| 1000 | ≈ 1e-15 |
What lux measure
Lux (lx) represent illuminance. One unit equals 10^0 lx. One lux equals one lumen per square meter of incident illuminance.
Reading the result in exalux
Exalux (Elx) represent illuminance. One unit equals 10^18 lx. One lux equals one lumen per square meter of incident illuminance.
Where this conversion helps
Convert an illuminance reading while retaining its measurement conditions. Illuminance varies with position, angle and distance. Scaling lux does not predict the light at another location.
How the scale changes
The input unit has a factor of 1e0 lx; the output unit has a factor of 1e18 lx. Multiply the entered number by the input factor, then divide by the output factor. The physical quantity stays the same while its numerical representation changes.
Reading very small or large results
Scientific notation keeps very small and large values readable: 2.5e-6 means 0.0000025. The converter calculates with 50 significant digits internally and displays up to 10. Exact unit definitions do not remove uncertainty from the original measurement.
References
Definitions and method references. Example rates and prices on this page are editable assumptions.